# i = 0
# while i <= 5:
#     i += 1
#     print("星期为:", i)
#     if i == 3:
#         break
#
# i = 0
# while i <= 5:
#     if i == 3:
#         break
#     print("星期为", i)
#     i += 1

# for i in range(1,6):
#     print("星期",i)
#     if i ==3:
#         break
#
# for i in range(1,6):
#     if i ==3:
#         break
#     print("星期",i)

i = 0
while i<5:
    i = i + 1
    if i == 4:
        continue
    print("星期", i)

for i in range(1,6):
    if i == 4:
        continue
    print("星期",i)

 a=8
# a+=2
# print(a)
# a -= 2
# print(a)
# a *= 2
# print(a)
# a /= 2
# print(a)
#
# a = 2
# b = 11
# print(a == b)
# print(a != b)
# print(a > b)
# print(a < b)
# print(a >= b)
# print(a <= b)
# print(True and False)
# print(True and True)
# print(True or False)
# print(not False)
# stat="hallo"
# print("h" in str1)
# print("a" in str1)
# print("c" not in str1)
# print("o" not in str1)
单分支
# score=eval(input("请输入成绩分数:"))
# if score<60:
#     print("成绩不及格")
# if 60<=score<80:
#     print("成绩一般")
# if 80<score<=90:
#     print("成绩良好")
# if 90<score<=100:
#     print("成绩优秀")
# score=eval(input("请输入成绩分数:"))
# if 60<=score:
#     print("成绩已及格")
#     if 90<score<=100:
#         print("成绩优秀")

# score=eval(input("请输入成绩分数:"))
# if 60<=score:
#     print("成绩已及格")
# if 90<=score<=100:
#     print("成绩很好")
双分支
# a=30
# if a>20:
#         print("变量a大于20")
# else:
#         print("变量a不大于20")
# acore=eval(input("请输入成绩分数:"))
# if score>=60:
#             print("成绩及格")
# if score>=90:
#                 print("成绩良好")
# else:
#                 print("成绩一般")
嵌套
# score=eval(input("请输入成绩分数:"))
# if acorr>=60:
#     print("成绩及格")
#     if acore>=90:
#         print("成绩很好")
#     else:
#         print("成绩不合格")
#         if score<30:
#             print("成绩极差")
#         else:
#             print("成绩较差")
# score=eval(input("请输入一个成绩分数："))
# if score>=80:
#     print("成绩优秀")
# elif score>=80:
#     print("成绩良好")
# elif score>=70:
#     print("成绩中等")
# elif score>=60:
#     print("成绩不及格")
score=eval(input("请输入一个年份："))
if score % 4==0 and score % 100!=0:
    print("是闰年")
elif score % 400==0:
    print("是闰年")
else:
    print("不是闰年")
score = eval(input("请输入年份"))
if score % 4 == 0 and score % 100!=0:
    print("闰年")
else:
    print("不为闰年")
    条件循环
    # a = 1
    # while a <= 100:
    #     print("今天是第%d天" % a)
    #     a = a + 1
    #
    # n = 1
    # sum = 0
    # while n <= 1000:
    #     sum = sum + n
    #     n = n + 1
    #     print(sum)
    # print(sum)
    遍历循环
    # for i in ["1","2","3","4"]:
    #     print(i)

    # for i in range(1,11):
    #     print(i, end=" ")
    #     print()
    # for i in range(1, 11, 2):
    #     print(i, end=" ")
    #     print( )
    # for i in range(2, 11, 2):
    #     print(i, end=" ")

    sum = 0
    for i in range(1, 101):
        print(i=1)
        print()
嵌套循环
# i = 1
# while i <= 5:
#     print("上班星期为:",i)
#     i = i + 1
#     t = 9
#     while t <= 17:
#         print("时间段:", t, end=" ")
#         t = t + 1
for嵌套for
# for i in range(1 , 6):
#     print("上班为周:", i)
#     for t in range(9,18):
#         print("时间段为:", t, end=" ")
#         print( )
九九乘法
i = 1
while i < 10:
    j = 1
    while j <= i:
        print("%d*%d =%d"%(j,i,j*i), end="  ")
        j += 1
    print(" ")
    i += 1